The Bank of Italy Building, also known as the Clay-Montgomery Building, is a building in San Francisco, California. This eight-story building became the headquarters of A. P. Giannini's Bank of Italy (precursor to the Bank of America) in 1908 after the 1906 San Francisco earthquake and fire destroyed the original bank building on Montgomery Avenue (now Columbus Avenue) in the nearby neighborhood of North Beach. The building was designated a National Historic Landmark in 1978 for its association with Giannini, who revolutionized retail banking in the early 20th century.